Stroller

ABSTRACT

A stroller includes armrests ( 3 ), rear legs ( 1 ) pivotally joined to the armrests ( 3 ), respectively, a handle ( 5 ) pivotally joined to the armrests ( 3 ), and brackets ( 4 ) connecting the handle ( 5 ) and the rear legs ( 1 ). The brackets ( 4 ) engage with locking members ( 6 ) mounted on lower end parts of side pipes of the handle ( 5 ). Holding members ( 10 ) are supported on sides of the side pipes opposite to sides of the same with which the brackets ( 4 ) are in contact of the side pipes b pins ( 70 ), respectively. When the stroller is folded in two, the stopping parts ( 6   b ) of the locking members ( 6 ) and the stopping parts ( 10   a ) of the holding members ( 10 ) are engaged, respectively.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a folding stroller and, moreparticularly, to a three-folding stroller capable of being locked in atwo-folded state.

[0003] 2. Description of the Related Art

[0004] A generally known folding stroller has a body frame consisting offront and back structures which can be pulled toward each other so thatthe folding stroller is folded in a compact state and the longitudinaldimension of the folding stroller is reduced. Hereinafter, this type ofa folding stroller will be referred to as a two-folding stroller.Another generally known folding stroller has a body frame consisting offront and back structures which can be pulled toward each other so thatthe longitudinal dimension of the folding stroller can be reduced andcan be further folded inward so that the lateral dimension of thefolding stroller is reduced to further facilitate carrying the foldingstroller. Hereinafter, this type of a folding stroller will be referredto as a three-folding stroller.

[0005] The foregoing known three-folding stroller is provided with alocking mechanism capable of locking the folding stroller only in athree-folded state, and is not provided with any locking mechanism forlocking the three-folding stroller in a two-folded state. Thus, thisthree-folding stroller cannot be held in a two-folded state.

[0006] Therefore, it is difficult for a person to fold the known foldingstroller by one hand with the other hand holding a baby, and it ispossible that the folding stroller unfolds accidentally when the foldingstroller is folded temporarily in two to carry the folding stroller upor down stairs, because the folding stroller is not provided with anylocking mechanism capable of locking the folding stroller in atwo-folded state.

SUMMARY OF THE INVENTION

[0007] Accordingly, it is an object of the present invention to providea three-folding stroller capable of surely remaining in a two-foldedstate.

[0008] According to one aspect of the present invention, a strollercomprises, as principal components: a pair of rear legs; and a handleconnected to the pair of rear legs; wherein the pair of rear legs can bemoved relative to the handle to folding positions for folding, andlocking means provided between the handle and the pair of rear legs, formaintaining the stroller in a folded state where the pair of rear legsare in the folding positions relative to the handle.

[0009] In the stroller according to the present invention, the rear legsand the handle are connected by brackets.

[0010] In the stroller according to the present invention, each of thelocking means includes a locking member slidably mounted on an end partof the handle, and a holding member capable of turning together with thebracket relative to the handle, and the locking member and the holdingmember are provided with first stopping parts, respectively, and thefirst stopping parts are engaged to each other when the stroller isfolded.

[0011] In the stroller according to the present invention, the holdingmember turns together with the bracket relative to the handle when thepair of rear legs are moved for folding relative to the handle, and therespective first stopping parts of the holding member and the lockingmember are engaged to each other when the pair of rear legs are foldedrelative to the handle.

[0012] In the stroller according to the present invention, the lockingmember and the bracket are provided with second stopping parts,respectively, and the second locking parts are engaged to each otherwhen the stroller is unfolded.

[0013] In the stroller according to the present invention, the lockingmember is urged toward the holding member by an elastic member.

[0014] In the stroller according to the present invention, the holdingmember has a working part capable of moving the locking member againstforce exerted by the elastic member while the holding member is beingturned.

[0015] In the stroller according to the present invention, armrests arejoined pivotally to the handle, and the pair of rear legs are joinedpivotally to the armrests, respectively.

[0016] In the stroller according to the present invention, the handlehas a middle section and opposite side sections capable of being turnedinward relative to the middle section, and the handle can be folded inthree.

[0017] In the stroller according to the present invention, front legsare connected to the rear legs by side connecting bars, and the holdingmembers are fixed to rear end parts of the side connecting bars,respectively.

[0018] According to another aspect of the present invention, athree-folding stroller comprises: a pair of rear legs; and a handleconnected to the pair of rear legs, the handle having opposite sideparts turnable forward; wherein the pair of rear legs can be movedrelative to the handle to folding positions for folding, and lockingmeans provided between the handle and the pair of rear legs, formaintaining the stroller in a folded state where the pair of rear legsare in the folding positions relative to the handle.

[0019] According to a third aspect of the present invention, a strollerincludes a pair of front legs, a pair of rear legs, a handle connectedto the pair of rear legs, a pair of side connecting bars respectivelyconnecting the right front leg and the right rear leg, and the leftfront leg and the left rear leg, and a stay connecting the sideconnecting bars; wherein a bottom included in a seat is supported on thestay.

[0020] In the stroller according to the present invention, the stay isprovided with seat support members longitudinally extending in oppositedirections from the stay.

BRIEF DESCRIPTION OF THE DRAWINGS

[0021]FIG. 1 is a schematic perspective view of a stroller in a firstembodiment according to the present invention in an unfolded state;

[0022]FIG. 2 is a perspective view of a locking mechanism included inthe stroller shown in FIG. 1, as viewed from the inner side of thestroller shown in FIG. 1;

[0023]FIG. 3 is a perspective view of the locking mechanism, as viewedfrom the outer side of the stroller shown in FIG. 1;

[0024]FIG. 4 is a perspective view of a locking member;

[0025] FIGS. 5(a) and 5(b) are skeletal side elevations of the strollershown in FIG. 1 in an unfolded state and in a folded state,respectively;

[0026]FIG. 6 is a fragmentary side elevation of the stroller in anunfolded state of assistance in explaining the locking operation of thelocking mechanism;

[0027]FIG. 7 is a fragmentary side elevation of the stroller ofassistance in explaining the locking operation of the locking mechanism,showing the holding member pushing up the locking member;

[0028]FIG. 8 is a fragmentary side elevation of the stroller in a foldedstate of assistance in explaining the locking operation of the lockingmechanism;

[0029]FIG. 9 is a perspective view of a conventional three-foldingstroller in an unfolded state;

[0030]FIG. 10 is a front elevation of the stroller shown in FIG. 9 in afolded state;

[0031]FIG. 11 is a perspective view of an important part of a strollerin a second embodiment according to the present invention; and

[0032]FIG. 12 is a perspective view of the stroller in the secondembodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] First Embodiment

[0034] An outline of a stroller will be explained.

[0035]FIG. 9 is a perspective view of a three-folding stroller in anunfolded state, namely, a working state, and FIG. 10 is a view of thesame stroller folded in three, and a locking mechanism included in thestroller. A folding operation for folding the unfolded stroller in theunfolded state shown in FIG. 9 in three as shown in FIG. 10 will bedescribed with reference to FIGS. 9 and 10.

[0036] Referring to FIG. 9, operating wires, not shown, are extendedfrom an operating device 7. Sliders, not shown, are moved by operatingthe operating wires so as to raise locking members 6 to disengage thelocking members 6 from corresponding brackets 4 holding the stroller inan unfolded state, so that the stroller is unlocked.

[0037] Then, the stroller is held by the opposite side sections C of ahandle 5, front wheels or armrests 3 are raised and turned toward abackrest B as indicated by the arrow X (a first folding step). Thelongitudinal dimension of the stroller can be reduced by folding thusthe stroller in two. Then, the opposite side sections C of the handle 5are bent forward in the direction of the arrows Y (a second holdingstep). The lateral dimension of the stroller can be reduced by thusfolding the stroller in three.

[0038] The stroller has a seat bottom divided into right and leftsections, and a mating mechanism D including mating members respectivelyconnected to inner end parts of the right and left section. When thestroller is thus folded in three as shown in FIG. 10, the mating membersare engaged to each other to lock the stroller in a three-folded state.

[0039] A folding stroller in a first embodiment according to the presentinvention will be described with reference to FIGS. 1 to 8.

[0040]FIG. 1 shows the three-folding stroller in the first embodiment inan unfolded state in a perspective view. The stroller has right and leftrear legs 1. Rear wheels 2 are supported for rotation on lower end partsof the rear legs 1, respectively. The rear wheels 2 are combined withwheel stoppers, not shown, respectively. The wheel stoppers restrain therear wheels 2 from rotation to park the stroller for a time in a desiredplace. Upper end parts of the rear legs 1 are joined pivotally tosubstantially middle parts of armrests 3, respectively.

[0041] Referring to FIG. 2, an L-shaped bracket 4 (connecting member)has one end pivotally connected to the outer side of a substantiallymiddle part of each rear leg 1 by a pin 60, and the other end pivotallyconnected to the lower end of the side section of the handle 5 havingthe shape of an inverted letter U by a pin 70. A second stopping part 4a and a first stopping part 4 b (FIG. 8) are formed in the bracket 4.The stopping parts 4 a and 4 b are spaced a predetermined angularinterval apart from each other. The second stopping part 4 a is able toengage with a second stopping part 6 a formed in a locking member 6.When the second stopping part 4 a and the second stopping part 6 a areengaged, the stroller is held in an unfolded state. The first stoppingpart 4 b is a recessed part of the bracket 4.

[0042] Referring again to FIG. 1, the locking member 6 is connected tothe operating device 7 mounted on the middle section of the handle 5 bythe wire, not shown, extended through the handle 5. The locking member 6is moved longitudinally upward along the side section of the handle 5 byoperating the operating device 7 to disengage the second stopping part 6a of the locking member 6 from the second stopping part 4 a of thebracket 4. The locking member 6 is pushed always toward the bracket 4 bya spring 5 a placed inside the handle 5.

[0043] Each armrest 3 has one end pivotally joined to the handle 5 andthe other end pivotally joined to front legs 8. Front wheels 9 areconnected to lower end parts of the front legs 8 by swivel mechanisms,not shown. The swivel mechanisms enables the smooth turning of thestroller to change the moving direction. The swivel mechanisms can belocked and unlocked as the occasion demands.

[0044] Referring to FIG. 3, a holding member 10 is pivotally connectedto the inner side of the lower end of each side section of the handle 5by the pin 70 opposite to the bracket 4 with respect to the handle 5.The holding member 10 has a first stopping part 10 a capable of engaginga first stopping part 6 b, diametrically opposite to the second stoppingpart 6 a, of the locking member 6 as shown in FIG. 4. Each of thestopping parts 6 a and 6 b has a recess of a fixed width formed in thelower end of the locking member 6.

[0045] Referring to FIG. 3, each of side connecting bars 11 has a rearend attached to the holding member 10. As shown in FIG. 1, a hook 12 anda ring 13 are hinged on middle parts of the right and the left front leg8, respectively. Front ends of the side connecting bars 11 are attachedto the hook 12 and the ring 13, respectively. When the stroller isfolded in three, the hook 12 and the ring 13 are engaged to hold thestroller in a folded state.

[0046] Connecting bars 14 a, 14 b and 14 c are extended between the pairof front legs 8, between the pair of side connecting bars 11 and betweenthe pair of rear legs 1, respectively. Each of the connecting bars 14 a,14 b and 14 c are divided into substantially equal three sections, andthe adjacent sections are joined by two joints, respectively. The middlesection of the handle 5, similarly to the connecting bars 14 a, 14 b and14 c, is divided into substantially equal three sections, and theadjacent sections are joined pivotally by two joints, respectively. Thejoints of the connecting bars 14 a, 14 b and 14 c and the middle sectionof the handle 5 are aligned substantially in two parallel lines,respectively, so that the body of the stroller can be folded in aU-shape.

[0047] The pair of front legs 8, the pair of side connecting bars 11,the pair of rear legs 1, the armrests 3 and the connecting bars 14 a, 14b and 14 c are essential members of the stroller and are assembled in aframe having a rectangular shape in a plane. A guard 15 is extendedbetween the front ends of the armrests 3 to protect a baby seated on theseat of the stroller and to prevent the child from falling forward offthe seat.

[0048] A folding operation for folding the stroller will be describedhereinafter. FIGS. 5(a) and 5(b) show the stroller shown in FIG. 1 in anunfolded state and in a folded state, respectively. The operating device7 is operated so as to raise the locking members 6 along the sidesections of the handle 5 to disengage the locking members 6 from thebrackets 4. Then, the armrests 3 are turned relative to the handle 5 inthe direction of the arrow A about a point a. Consequently, the upperends of the rear legs 1 are moved toward the handle 5, and the brackets4 are turned in the direction of the arrow B about a point b. As thebrackets 4 are thus turned in the direction of the arrow B, the frontlegs 8 are raised and are turned in the direction of the arrow C about apoint c. Thus, the stroller is folded in the so-called two-folded statewith the rear legs 1 and the front legs 8 being moved toward asubstantially middle part of the handle 5 as shown in FIG. 5(b).

[0049] The locking operation of the locking mechanism of the foldingstroller in the first embodiment will be described with reference toFIGS. 6 to 8. FIG. 6 shows the locking mechanism in a state where thestroller is unfolded, FIG. 7 shows the locking mechanism in a state in astate where the holding member 10 has been turned through an angle ofabout 30° from a position for the unfolded state and the locking member6 is raised by a working part 10 b of the holding member 10, and FIG. 8shows the locking mechanism in a locking state where the stroller isfolded.

[0050] Referring to FIG. 6, when the stroller is in the unfolded state,the second stopping part 4 a of the bracket 4 is engaged with the secondstopping part 6 a of the locking member 6 to retain the stroller in theunfolded state. In FIG. 6, a line 100 indicates the position and angleof the side connecting bar 11.

[0051] When the operating device 7 is operated by a predeterminedoperation, such as an operation of pushing a button, to raise thelocking member 6 along the side part of the handle 5 with the strollerin the unfolded state, the locking member 6 is disengaged from thebracket 4 to enable the rear leg 1 to turn. Then, the handle 5 is heldby the opposite side parts thereof, the front wheels 9 are lifted up, orthe armrests 3 are turned backward. Consequently, the bracket 4 isturned together with the turning rear leg 1, and hence the holdingmember 10 supported on the pin 70 is turned as shown in FIG. 7.

[0052] Then, the working part 10 b of the holding member 10 raises thelocking member 6. Upon the arrival of the stopping part 10 a of theholding member 10 at a predetermined position, the locking member 6 islowered by the resilience of the spring 5 a, and the stopping part 6 bof the locking member 6 and the stopping part 10 a of the holding member10 are engaged to fold completely the stroller in two. When the stoppingpart 6 b of the locking member 6 and the stopping part 10 a of theholding member are engaged, a part of the locking member 6 engages inthe stopping part 4 b of the bracket 4 to restrain the bracket 4 and theholding member 10 from turning relative to the handle 5. Thus, thestroller is locked in the two-folded state. The stopping part 6 b of thelocking member 6, and the stopping part 10 a of the holding member 10constitute the locking mechanism.

[0053] The two-folded stroller is further folded in three in a U-shapein a plane. The opposite side parts of the handle 5 (FIG. 1) is turnedforward. Since each of the handle 5 and the connecting bars 14 a, 14 band 14 c has the pivotal joints at positions dividing the length thereofsubstantially in three equal sections as mentioned above, the pivotaljoints of the handle 5, and the connecting bars 14 a, 14 b and 14 c arealigned substantially in two parallel lines. Therefore, when theopposite side sections of the handle 5 is turned forward, the sidesections of the connecting bars 14 a, 14 b and 14 c are turned forwardaccordingly. Consequently, the stroller can be folded in three in aU-shape in a plane as shown in FIG. 10.

[0054] When the stroller is thus folded in the U-shape to reduce thewidth thereof, the front ends of the side connecting bars 11 extendedbetween the front legs 8 and the holding members 10 approach each other.Since the hook 12 and the ring 13 are connected to the front ends of theconnecting bars, respectively, the hook 12 and the ring 13 are engagedautomatically when the front ends of the side connecting bars 11approach each other to hold the stroller surely in the three-foldedstate.

[0055] When it is desired to unfold the three-folded stroller, the hook12 and the ring 13 are disengaged by a user, and the reverse steps ofthe above steps shown in FIGS. 6 to 8 are carried out.

[0056] As mentioned above, according to the above embodiment, thestroller can be securely folded and maintained in the two-folded stateby the above simple manner, since the holding member 10 has the stoppingpart 10 a engaged with the locking member 6. In addition, since thestroller is maintained in the two-folded state, the stroller can beeasily carried in the two-folded state.

[0057] Although the invention has been described as applied to thethree-folding stroller, the present invention is not limited thereto inits practical application and it goes without saying that the presentinvention is applicable also to two-folding strollers.

[0058] Although the locking member 6 engages in the first stopping part4 b of the bracket 4 to hold the stroller in the two-folded state in thestroller in the first embodiment, the bracket 4 does not neednecessarily to be provided with the first stopping part 4 b.

[0059] As apparent from the foregoing description, the folding strolleraccording to the present invention comprises the plurality of componentmembers assembled in the frame of the rectangular shape in a plane, andthe handle connected to one set of the component members among theplurality of component members by the connecting members, and theopposite side sections of the handle and the parallel component memberscan be turned forward. Since the stopping means is formed on the baseparts of the handle to hold the component members in a state where thecomponent members are moved toward the handle, and the stopping membersholds the stroller in the two-folded state, the stroller can be easilyfolded and the accidental unfolding of the stroller can be prevented.

[0060] Second Embodiment

[0061] A stroller in a second embodiment according to the presentinvention will be described with reference to FIGS. 11 and 12. FIG. 12is a partly cutaway perspective view of a stroller provided with asuspended seat. The stroller has a body including right and left frontlegs 112 provided with front wheels 111, right and left rear legs 114provided with rear wheels 113, a substantially U-shaped handle 115, andright and left arm rests 116. A detachable guard 117 is extended betweenthe armrests 116. The handle 115 has right and left side pipes 118. Rearends of the armrests 116 are joined pivotally to parts of the side pipes118 near the lower ends of the same. Upper ends of the front legs 112are joined pivotally to the front ends of the armrests 116,respectively. The upper ends of the rear legs 114 are joined pivotallyto middle parts of the armrests 116, respectively. Lower ends ofL-shaped brackets 119 are joined pivotally to middle parts of the rearlegs 114, respectively. The lower ends of the side pipes 118 are joinedpivotally to middle parts of the brackets 119, respectively. When thestroller is unfolded, locking members 120 axially slidably mounted onlower end parts of the side pipes 118 engage stopping parts formed inthe upper ends of the brackets 119 to hold the stroller in an unfoldedstate.

[0062] A front connecting bar 121 is extended between the right and theleft front legs 112. A rear connecting bar 122 is extended between theright and the left rear legs 114. Side connecting bars 123 have frontends pivotally joined to middle parts of the front legs 112,respectively, and rear ends pivotally joined together with the brackets119 to the lower ends of the side pipes 118, respectively. A stay 124 isextended between middle parts of the right and the left side connectingbars 123.

[0063] The stroller is held in an unfolded state for use by engaging thelocking members 120 mounted on the lower end parts of the side pipes 118with the stopping parts formed in the upper end parts of the brackets119. When the locking members 120 are disengaged from the brackets 119by operating an operating device 125 mounted on the handle 115, thearmrests 116 and the side connecting bars 123 can be turned on pinspivotally supporting the armrests 116 and the side connecting bars 123,the front legs 112 and the rear legs 114 are turned so as to extendsubstantially parallel to each other, and the stroller can be thusfolded to facilitate carrying the same.

[0064] Each of the handle 115, the front connecting bar 121, the rearconnecting bar 122 and the upper connecting bar 124 is divided intothree sections, and the three sections are joined by a pair of pivotaljoints. The pairs of pivotal joints of the handle 115, the frontconnecting bar 121, the rear connecting bar 122 and the upper connectingbar 124 are included in two vertical planes, respectively. When theopposite side pipes 118 are turned forward after setting the front legs112 and the rear legs 114 in parallel to each other, the opposite sidesections of the handle 115, the front connecting bar 121, the rearconnecting bar 122 and the stay 124 are turned forward, so that thestroller can be folded in three.

[0065] A seat 126 is supported on the right and the left side pipe 118and the side connecting bars 123. The backrest of the seat 126 isconnected to the side pipes 118, and the bottom 126 b of the seat 126 isattached to the right and the left side connecting bars 123 to suspendthe seat 126 like a hammock. The stay 124 supports the bottom 126 bthereon.

[0066] The condition of the seat 126 on the stroller will be describedwith reference to FIG. 11 showing major parts of the stroller. The frontends of the side connecting bars 123 are joined pivotally to the middleparts of the front legs 112, respectively, and the rear ends of the sideconnecting bars 123 are joined pivotally, together with the brackets 119pivotally joined to the rear legs 114, to the lower ends of the sidepipes 118, respectively. The stay 124 is extended between the middleparts of the right and the left side connecting bar 123. The stay 124 isdivided into three sections, and the three sections are connected by twopivotal joints 124 a and 124 b. Thus, the opposite side sections of thestay 124 are able to turn on the pivotal joints 124 a and 124 b,respectively. Seat support members 130 for supporting the seat 126extend longitudinally from the front to the rear outside the pivotaljoints 124 a and 124 b, respectively. When the seat 126 is installed onthe body of the stroller, the bottom 126 b, particularly, a core 126 acombined with the bottom 126 b is supported by the stay 124 and the seatsupport members 130.

[0067] Since the bottom 126 b of the seat 126 is supported on thelongitudinally extending seat support members 130, the seat 126 isunable to swing on the stay 124 and the stability of the bottom 126 bcan be improved.

[0068] As apparent from the foregoing description, the stay connectingthe side connecting bars connecting the front legs and the rear legs isprovided with the longitudinal seat support members, and the bottom ofthe seat suspended like a hammock is supported on the longitudinal seatsupport members. Thus, the bottom of the seat is restrained fromswinging on the stay and longitudinal movement. Consequently, thestability of the bottom can be improved, and the baby riding in thestroller can enjoy improved comfortableness.

What is claimed is:
 1. A stroller comprising; a pair of rear legs; and ahandle connected to the pair of rear legs; wherein the pair of rear legscan be moved relative to the handle to folding positions for folding,and locking means provided between the handle and the pair of rear legs,for maintaining the stroller in a folded state where the pair of rearlegs are in the folding positions relative to the handle.
 2. Thestroller according to claim 1, wherein the rear legs and the handle areconnected by brackets.
 3. The stroller according to claim 2, whereineach of the locking means includes a locking member slidably mounted onan end part of the handle, and a holding member capable of turningtogether with the bracket relative to the handle, and the locking memberand the holding member are provided with first stopping parts,respectively, and the first stopping parts are engaged to each otherwhen the stroller is folded.
 4. The stroller according to claim 3,wherein the holding member turns together with the bracket relative tothe handle when the pair of rear legs are moved for folding relative tothe handle, and the respective first stopping parts of the holdingmember and the locking member are engaged to each other when the pair ofrear legs are folded relative to the handle.
 5. The stroller accordingto claim 3, wherein the locking member and the bracket are provided withsecond stopping parts, respectively, and the second stopping parts areengaged to each other when the stroller is unfolded.
 6. The strolleraccording to claim 4, wherein the locking member is urged toward theholding member by an elastic member.
 7. The stroller according to claim6, wherein the holding member has a working part capable of moving thelocking member against force exerted by the elastic member while theholding member is being turned.
 8. The stroller according to claim 1,wherein armrests are joined pivotally to the handle, and the pair ofrear legs are joined pivotally to the armrests, respectively.
 9. Thestroller according to claim 1, wherein the handle has a middle sectionand opposite side sections capable of being turned inward relative tothe middle section, and the handle can be folded in three.
 10. Thestroller according to claim 3, wherein front leg are connected to therear legs by side connecting bars, respectively, and the holding membersare fixed to rear end parts of the side connecting bars, respectively.11. A three-folding stroller comprising; a pair of rear legs; and ahandle connected to the pair of rear legs, the handle having oppositeside parts turnable forward; wherein the pair of rear legs can be movedrelative to the handle to folding positions for folding, and lockingmeans provided between the handle and the pair of rear legs, formaintaining the stroller in a folded state where the pair of rear legsare in the folding positions relative to the handle.
 12. Thethree-folding stroller according to claim 11, wherein the rear legs andthe handle are connected by brackets.
 13. The three-folding strolleraccording to claim 12, wherein each of the locking means includes alocking member slidably mounted on an end part of the handle, and aholding member capable of turning together with the bracket relative tothe handle, and the locking member and the holding member are providedwith first stopping parts, respectively, and the first stopping partsare engaged to each other when the stroller is folded.
 14. Thethree-folding stroller according to claim 13, wherein the holding memberturns together with the bracket relative to the handle when the pair ofrear legs are moved for folding relative to the handle, and therespective first stopping parts of the holding member and the lockingmember are engaged to each other when the pair of rear legs are foldedrelative to the handle.
 15. The three-folding stroller according toclaim 13, wherein the locking member and the bracket are provided withsecond stopping parts, respectively, and the second stopping parts areengaged to each other when the stroller is unfolded.
 16. Thethree-folding stroller according to claim 14, wherein the locking memberis urged toward the holding member by an elastic member.
 17. Thethree-folding stroller according to claim 16, wherein the holding memberhas a working part capable of moving the locking member against forceexerted by the elastic member while the holding member is being turned.18. The three-folding stroller according to claim 11, wherein armrestsare joined pivotally to the handle, and the pair of rear legs are joinedpivotally to the armrests, respectively.
 19. The three-folding strolleraccording to claim 13, wherein front leg are connected to the rear legsby side connecting bars, respectively, and the holding members are fixedto rear end parts of the side connecting bars, respectively.
 20. Astroller comprising: a pair of front legs; a pair of rear legs; a handleconnected to the pair of rear legs; a pair of side connecting barsrespectively connecting the right front leg and the right rear leg, andthe left front leg and the left rear leg; and a stay connecting the sideconnecting bars; wherein a bottom included in a seat is supported on thestay.
 21. The stroller according to claim 20, wherein the stay isprovided with seat support members longitudinally extending in oppositedirections from the stay.